Metasurface Antennas: Design and Performance

Marco FAENZI; Gabriele MINATTI; Stefano MACI

doi:10.1587/transcom.2018ISI0004

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Metasurface Antennas: Design and Performance

Marco FAENZI, Gabriele MINATTI, Stefano MACI

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This paper gives an overview on the design process of modulated metasurface (MTS) antennas and focus on their performance in terms of efficiency and bandwidth. The basic concept behind MTS antennas is that the MTS imposes the impedance boundary conditions (IBCs) seen by a surface wave (SW) propagating on it. The MTS having a spatially modulated equivalent impedance transforms the SW into a leaky wave with controlled amplitude, phase and polarization. MTS antennas are hence highly customizable in terms of performances by simply changing the IBCs imposed by the MTS, without affecting the overall structure. The MTS can be configured for high gain (high aperture efficiency) with moderate bandwidth, for wide bandwidth with moderate aperture efficiency, or for a trade-off performance for bandwidth and aperture efficiency. The design process herein described relies on a generalized form of the Floquet wave theorem adiabatically applied to curvilinear locally periodic IBCs. Several technological solutions can be adopted to implement the IBCs defined by the synthesis process, from sub-wavelength patches printed on a grounded slab at microwave frequencies, to a bed of nails structure for millimeter waves: in any case, the resulting device has light weight and a low profile.

Publication: IEICE TRANSACTIONS on Communications Vol.E102-B No.2 pp.174-181

Publication Date: 2019/02/01

Publicized: 2018/08/21

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2018ISI0004

Type of Manuscript: Special Section INVITED PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2017)

Category: Antennas

Authors

Marco FAENZI
  University of Siena
Gabriele MINATTI
  Wave Up S.r.l.
Stefano MACI
  University of Siena

Keyword

metasurface antennas, leaky waves, artificial surfaces, Floquet waves, impedance boundary conditions

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Marco FAENZI, Gabriele MINATTI, Stefano MACI, "Metasurface Antennas: Design and Performance" in IEICE TRANSACTIONS on Communications, vol. E102-B, no. 2, pp. 174-181, February 2019, doi: 10.1587/transcom.2018ISI0004.
Abstract: This paper gives an overview on the design process of modulated metasurface (MTS) antennas and focus on their performance in terms of efficiency and bandwidth. The basic concept behind MTS antennas is that the MTS imposes the impedance boundary conditions (IBCs) seen by a surface wave (SW) propagating on it. The MTS having a spatially modulated equivalent impedance transforms the SW into a leaky wave with controlled amplitude, phase and polarization. MTS antennas are hence highly customizable in terms of performances by simply changing the IBCs imposed by the MTS, without affecting the overall structure. The MTS can be configured for high gain (high aperture efficiency) with moderate bandwidth, for wide bandwidth with moderate aperture efficiency, or for a trade-off performance for bandwidth and aperture efficiency. The design process herein described relies on a generalized form of the Floquet wave theorem adiabatically applied to curvilinear locally periodic IBCs. Several technological solutions can be adopted to implement the IBCs defined by the synthesis process, from sub-wavelength patches printed on a grounded slab at microwave frequencies, to a bed of nails structure for millimeter waves: in any case, the resulting device has light weight and a low profile.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2018ISI0004/_p

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@ARTICLE{e102-b_2_174,
author={Marco FAENZI, Gabriele MINATTI, Stefano MACI, },
journal={IEICE TRANSACTIONS on Communications},
title={Metasurface Antennas: Design and Performance},
year={2019},
volume={E102-B},
number={2},
pages={174-181},
abstract={This paper gives an overview on the design process of modulated metasurface (MTS) antennas and focus on their performance in terms of efficiency and bandwidth. The basic concept behind MTS antennas is that the MTS imposes the impedance boundary conditions (IBCs) seen by a surface wave (SW) propagating on it. The MTS having a spatially modulated equivalent impedance transforms the SW into a leaky wave with controlled amplitude, phase and polarization. MTS antennas are hence highly customizable in terms of performances by simply changing the IBCs imposed by the MTS, without affecting the overall structure. The MTS can be configured for high gain (high aperture efficiency) with moderate bandwidth, for wide bandwidth with moderate aperture efficiency, or for a trade-off performance for bandwidth and aperture efficiency. The design process herein described relies on a generalized form of the Floquet wave theorem adiabatically applied to curvilinear locally periodic IBCs. Several technological solutions can be adopted to implement the IBCs defined by the synthesis process, from sub-wavelength patches printed on a grounded slab at microwave frequencies, to a bed of nails structure for millimeter waves: in any case, the resulting device has light weight and a low profile.},
keywords={},
doi={10.1587/transcom.2018ISI0004},
ISSN={1745-1345},
month={February},}

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TY - JOUR
TI - Metasurface Antennas: Design and Performance
T2 - IEICE TRANSACTIONS on Communications
SP - 174
EP - 181
AU - Marco FAENZI
AU - Gabriele MINATTI
AU - Stefano MACI
PY - 2019
DO - 10.1587/transcom.2018ISI0004
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E102-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2019
AB - This paper gives an overview on the design process of modulated metasurface (MTS) antennas and focus on their performance in terms of efficiency and bandwidth. The basic concept behind MTS antennas is that the MTS imposes the impedance boundary conditions (IBCs) seen by a surface wave (SW) propagating on it. The MTS having a spatially modulated equivalent impedance transforms the SW into a leaky wave with controlled amplitude, phase and polarization. MTS antennas are hence highly customizable in terms of performances by simply changing the IBCs imposed by the MTS, without affecting the overall structure. The MTS can be configured for high gain (high aperture efficiency) with moderate bandwidth, for wide bandwidth with moderate aperture efficiency, or for a trade-off performance for bandwidth and aperture efficiency. The design process herein described relies on a generalized form of the Floquet wave theorem adiabatically applied to curvilinear locally periodic IBCs. Several technological solutions can be adopted to implement the IBCs defined by the synthesis process, from sub-wavelength patches printed on a grounded slab at microwave frequencies, to a bed of nails structure for millimeter waves: in any case, the resulting device has light weight and a low profile.
ER -